I see some issues with the patch. First, file
Horde/Core/Mime/Headers/Received.php is never used in my installation,
the right one is Horde/Mime/Headers/Deprecated.php . Second, this
header was generated:

The problem is that the first IP address (within no brackets) is
supposed to be an HELO/EHLO string. If HELO/EHLO is an IP address, it
must be inside "[" and "]" brackets. The headers should look like this: